EVERYDAY SCIENCE

Detailed explanation-1: -Mitochondria fulfill important functions in photosynthetic cells not only in darkness but also in light. Mitochondrial oxidative phosphorylation is probably the main mechanism to supply ATP for extrachloroplastic functions in both conditions.

Detailed explanation-2: -Chlorophyll is a key component in the process of photosynthesis, which sustains plant life and produces oxygen for the entire planet.

Detailed explanation-3: -Chlorophyll role is to absorb light from sunlight in plants. The energy absorbed from light is utilized to convert carbon dioxide and water molecules into glucose, through photosynthesis. Chlorophyll being a primary pigment (photoreceptor) reflects green light, absorbing red and blue light in the chloroplast.

Detailed explanation-4: -In plants and algae, which developed much later, photosynthesis occurs in a specialized intracellular organelle-the chloroplast. Chloroplasts perform photosynthesis during the daylight hours. The immediate products of photosynthesis, NADPH and ATP, are used by the photosynthetic cells to produce many organic molecules.